Grading-machine.



G. K. STOCKLAND.

GRADING MACHINE.

APPLICATION FILED MAY 2, 1914.

1, 126,1 1 7, Patnted Jan. 26, 1915.

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GRADING MACHINE.

APPLICATION FILED MAY 2, 1914. 1,126,1 17. Patented Jan. 26, 1915.

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'- K. STOGHAND, F MINNEAPOLIS, IZQINNES'OTA.

GEINWMAGHINE.

anem a.

Application filed Mag 2, 1914.

. To all whom it may concern:

Be it known that 1, CHARLES K. Sroon- LAND, a citizen of the UnitedStates, residing at Minneapolis, in the county of Hennepin and State ofMinnesota, have invented certain new and useful Improvements inGrading-Machines, of which the following is a specification.

My invention relates to grading machines of the type disclosed in myco-pending application, Serial No. 779,766, filed July 18, 1,913, andhas for its object to provide a grading machine of the standardreversible type having means for lifting the scraper blade and thedrawbar or frame connected therewith bodily and rapidly through aconsiderable range of movement by means of a single lever provided forthat purpose. This quick lifting mechanism is in addition to the usualworm-gear lift for lifting independently either side of the scraperblade, and works independently of suchworm-gear lift.

My device makes it practicable to do away with the gooseneck drawbarcommonly used in connection with wheeled scrapers of the type hereinshown and claimed and at the same time obtain the advantages in' thematter of clearance and throat room with the use of a straight drawbaror a drawbar all parts of which are in a horizontal plane.

The full objects and advantages of my invention will appear inconnection with the detailed description thereof and areparticularlypointed out in the claims.

In the drawings, illustrating the ap heation of my invention in one for1n, igure .1 is a plan View of a road scraper embodying my invention.Fig. 2 is a side elevation view showing the scraper blade in loweredposition. Fig. 3 is a view similar to Fig. showing the scraper blade inraised position. Figs. 4, 5 and 6 are detail views of the connection ofthe lifting lever. Figs. 7, 8 and 9 are detail sectional views of thebracket supports for the worm gear lifting mechanism.

'The road grading machine to which my improvements are applied is whatis generally known as a standard reversible grader. This comprises arectangular frame comprising longitudinal side members 10 and 11 andfront and rear crossbars 12, 13. This frame is supported in an upperplane from front wheels 14 by means of standards 15, and from rear.Wheels 16 by means of up;

Specification of Letters Patent.

Patented Jan. 26, 191115. semi no. 35,797.

right side standards 17 and angularly-disposed tie members 18, saidstandards and t e members being secured to framepieces 19, upon which issupported a platform 20 on a much lower level than the plane of theupper rectangular frame. At the front of the frame, in addition tocrossbar 12, is another crossbar 21 which has secured centrally theretoa post 22, said post being secured at its lower end. to the axle orfront truck of the machine. The scraper blade 23 is secured by means ofarms 24 to a fifth wheel construction 25, indicated most clearly ln-Flg.1, a portion 26 of said construction being rigidly secured to a pair ofnormally horizontal arms 27, 28. The arms 27, 28 extend forwardly andare rigidly united at 29 with a bifurcated piece 30 which straddles theost 22' and may be provided with an anti 'riction roller 31 engagingsaid post on the side away from scraper 23. The frame member is thusconnected for traction purposes with the post 22 by means of the members28, which, as above pointed out, lie in a common plane normallyhorizontal, the usual gooseneck employed in constructions of this typebeing omitted.

I will now describe the means by which the scraper blade is suspendedand may be lifted bodily, including the draft bars 27 28, gr maybelifted at either end thereof independently of said draft bars. As bestshown in Fig. 1, an arm 32 is rigidly attached to draft bars 27, and, asimilar arm 33"is rigidly attached to draft bar 28. The arms 32 and 33are connected by means of links 34 with arms 35 and 3.6 11%0 the ends ofrock shafts 37 and 3.8. I he rock shafts 37 and 38 are journaled' at oneend in bearings 39 formed on the side of blocks 40, slidable uponarcshaped standards 41 secured to the respecti've side frame members 10and 11. As clearly shown in Fig. 5, the arc-shaped standards 41 areformed of T-iron, and the slides 40 clasp the base of the T member withthe flange extending through a slot 42 in the slide 40. The other end ofshafts 37 p and 38 are journaled in bearings 43 formed oscillate uponsaid standard about the center of shaft -16. The shafts 37 and 38 havethereon, outside of bearings 42, a worm wheel 48 meshing with a worm 19upon shaft 16. Each of shafts -16 has thereon a large hand wheel 50,such as is commonly employed in road grading machines. By rotatingeither of hand wheels 50as desired, the shafts 37 or 38 will be rockedand arms 35 or 36 oscillated, which will have the effect of lifting oneend or the other of the scraper blade 23, as desired. This specificlifting means per se is that commonly employed in grading machines ofth1s type. The particular mounting of this lifting means, which incooperation with other elements permits the scraper blade and draftframe to be quickly lifted bodily independently of the worm-wheel lift,comprises the main features of my invention.

A shaft 51 is journaled transversely between members 10 and 11 near thefront end thereof, and has thereon an arm 52 which is pivotallyconnected at 53 with an arm or link 54 pivoted to the draft framemembers 27, 28 at the meeting point thereof. The link 54: is providedwith a wing 55 wh ch, when the parts are in the lowered positionindicated in Fig. 2, engages the upper portion of arm 52, holding theparts in fixed relation. Another arm 56 on shaft 51 is rigid with arm52, and is pivotally connected by link 57 with an arm 58 on a shaft 59pivoted in uprights 60 carried by frame members 10 and 11. Fast on shaft59, at each end thereof, are links 61 pivotally connected at 62 within acutaway portion 63 of an arm or link (34:, which is pivotally connectedto an extension bolt 65 from sliding piece 40 and has a lip portion 66engaging the back of arm 61 to hold the parts in fixed relative positionwhen the scraper is lowered. Rigid with arm 58 on shaft 59 is adepending arm 67, which is connected by link 68 with the lower end of alever 69 pivoted intermediate its ends at '70 to a stand '71 carried bycrossbar 13. The lever 69 is locked in position by means of a ratchetand segment 72, of usual construction, carried by stand 70. Springs 73are connected with arms 61 and the upper ends of stands 11, and areextended by the descent of the scraper blade 23 and draft frame 28.These springs aid in starting the parts upwardly when the lever 69 isoperated.

The operation of these devices will be clear from the description abovegiven. The wheels 50 at all times may be used in the usual wayv tooperate the worm-gear lift to lift or lower either end of the scraperblade. If, however,-it is desirable to lift the entire scraper quicklyfor dodging a rock, stump, or for any other reason, the operator maysimply pull rearwardly on lever 69. This oscillates the shaft 59, whichsimultaneously,

through arms 61 thereon connected with blocks 40 and arms 52 connectedwith the front end of the draft frame, and through arm 56 and link 57with arm 58, lifts the entire scraper blade and draft frame verticallyblade is extended obliquely, as clearly shown,

and the front part of the blade would be much nearer the point ofpivoting than the rear, part of the blade. Therefore, for a given liftthe rear part of the blade would rise further than the front part.Moreover, the front part of the blade is usually that portion which ismost depressed for operation, and, therefore, to clear an obstructionwould have to be lifted a greater extent than the rear blade, and in thepivoted gooseneck construction it frequently would be impossible to liftthe front portion of the blade sufficiently to clear a givenobstruction.

I claim:

1. A road grading machine comprising a wheel-supported frame, a draftframe connected thereto for vertical movement, a scraper blade carriedby the draft frame, a plurality of arms connected with and supportingsaid draft frame and scraper blade, means to move all said armssimultaneously for raising the scraper and draft frame bodily anduniformly throughout its length, and means for moving some of said armsindependently of said uniform moving means to position the scraper bladerelative to the point of connectionof the draft frame witl thewheel-supported frame.

2. A road grading machine comprising a wheel-supported frame, a draftframe connected thereto for vertical movement, a scraper blade carriedby the draft frame, means supporting said draft frame from thefirst-named frame at a plurality of points, means for operating all ofsaid supporting means simultaneously to move the entire draft frame andscraper vertically and uniformly throughout its length, and means insaid supporting means for automatically locking the draft frame againstvertical movement when said draft frame has been dropped into itslowered or operative position.

3. A road grading machine comprising a wheel-supported frame, a draftframe connected thereto for vertical movement, a scraper blade carriedby the draft frame, and means for lifting the draft frame and mean"?scraper blade bodily and uniformly throughout its length, said meanscomprising a toggle link having means for holding the portions thereofset when said toggle is broken past the central line thereof in onedirection for automatically locking the draft frame against verticalmovement when said draft frame has been dropped into its lowered oroperative position.

4. A road grading machine comprising a wheel-supported frame, a draftframe connected thereto for vertical movement, a scraper blade carriedby the draft frame, a pivoted arm supporting the front of said scraperframe, a pair of oscillating arms supporting the rear side portions ofsaid scraper frame, means for moving all of said arms simultaneously forraising the draft frame and scraper bodily and uniformly throughout itslength, and means for oscillating said rear supporting armsindependently for lifting either side of the scraper blade independentlyof said uniform moving means.

A road grading machine comprising a wheel-supported frame, a draft frameconnected thereto for bodily movement, a scraper blade carried by thedraft frame, a pivoted arm connected with the front end of the draftframe for supporting the same, a pair of slides, means connected withsaid slides and operable independently thereof for supporting andadjusting the rear portions of the draft frame, and means for movingsaid slides and pivoted arm simultaneously for raising the draft frameand scrapfir bodily and uniformly throughout its lengt 6. A road gradingmachine comprising a wheel-supported frame, a draft frame connectedthereto for bodily movement, a scraper blade carried by the draft frame,a pivoted arm connected with the front end of the draft frame forsupporting the same, a pair of pivoted brackets, a pair of slidesmovable in an are having its center at the center of oscillation of saidbrackets, shafts journaled in said slides and brackets, arms on saidshafts connected with the rear portions of the scraper frame, worm gearmechanism for oscillatin said shaft, and means for moving said sides andpivoted arm simultaneously for raising the draft frame and scraperbodily and uniformly throughout its length.

In testimony whereof I afiix my signature in presence of two witnesses.

CHARLES K. STOCKLAND. \Vitnesses:

H. A. BOWMAN, F. A. WHITELEY.

